This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 551 |
| 3 | 12649 |
| 4 | 290376 |
| 5 | 6665999 |
| 6 | 153027601 |
| 7 | 3512968824 |
| 8 | 80645255351 |
| 9 | 1851327904249 |
| 10 | 42499896542376 |
| 11 | 975646292570399 |
| 12 | 22397364832576801 |
| 13 | 514163744856696024 |
| 14 | 11803368766871431751 |
| 15 | 270963317893186234249 |